Ethyl 2-amino-3-(difluoromethyl)-4-methoxypyridine-6-carboxylate
6-Amino-3-(difluoromethyl)-4-iodopyridine-2-carboxaldehyde
Methyl 4-amino-3-(difluoromethyl)-2-methoxypyridine-6-carboxylate
4-Amino-6-(difluoromethyl)-2-iodopyridine-3-carboxylic acid
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